Country size comparison
compared to
Brunei is about 1,343 times smaller than Australia.
Australia is approximately 7,741,220 sq km, while Brunei is approximately 5,765 sq km, making Brunei 0.07% the size of Australia. Meanwhile, the population of Australia is ~26.1 million people (25.7 million fewer people live in Brunei).
Compare further: Brunei vs. Australia